摘要
                
                    以丙酸作为调节剂,在非表面活性剂二甲基酰胺溶剂中制备具有(111)优势晶面的八面体/截角八面体Pt-Ni合金,通过调节羧酸的类型,揭示该体系控制形貌和尺寸的机理。丙酸和二甲基酰胺在高温高压下形成的醛是一种弱吸附的表面活性剂,可选择性吸附于Pt-Ni合金的不同晶面上,促进Pt-Ni合金纳米晶的形貌控制。电化学测试结果表明:八面体/截角八面体形貌的Pt-Ni合金催化剂在0. 9 V的氧还原反应活性面密度高达2. 56 m A/cm^2,是商业Pt/C催化剂的13倍,相应的比活性则达到商业Pt/C催化剂的3倍。这是因为八面体/截角八面体Pt-Ni合金催化剂具有(111)优势晶面和洁净的活性表面。
                
                The octahedral/truncated octahedral Pt-Ni alloy nanocrystals with(111) preferential crystal plane by use of propionic acid( PA) as regulators in none-surfactant dimethylformamide( DMF) solvents were prepared. The mechanism of controlling shape and size was revealed. The aldehyde produced by the reaction between DMF and PA under the high temperature and high pressure acting as weak surfactants could be selectively adsorbed on the different crystal planes of Pt-Ni alloy,which facilitated the shape control of Pt-Ni alloy nanocrystals. Electrochemical test results showed that oxygen reduction reaction( ORR) area density at 0. 9 V of Pt-Ni alloy catalysts containing octahedron/truncated octahedral morphology was 2. 56 m A/cm^2,which was 13 times that of commercial Pt/C catalysts,corresponding specific activity was 3 times that of commercial Pt/C catalysts. It was attributed to the(111) preferential crystal plane and cleaned active area of Pt-Ni alloy catalysts.
    
    
                作者
                    张娜
                    陈红
                    章丹亭
                    尹鸽平
                ZHANG Na;CHEN Hong;ZHANG Dan-ting;YIN Ge-ping(Beijing Aerospace Propulsion Institute,Beijing 100076,China;School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin,Heilongjiang 150001,China)
     
    
    
                出处
                
                    《电池》
                        
                                CAS
                                CSCD
                                北大核心
                        
                    
                        2018年第5期299-303,共5页
                    
                
                    Battery Bimonthly
     
    
    
    
                作者简介
张娜(1986-),女,湖北人,北京航天动力研究所工程师,研究方向:燃料电池组件及系统设计,本文联系人;;陈红(1987-),男,江苏人,北京航天动力研究所高级工程师,研究方向:燃料电池组件及系统设计;;章丹亭(1992-),男,江西人,北京航天动力研究所工程师,研究方向:燃料电池组件及系统设计;;尹鸽平(1957-),女,黑龙江人,哈尔滨工业大学化工与化学学院教授,博士生导师,研究方向:锂离子电池和燃料电池。